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    Question

    A vessel of capacity 1000 litres is full of milk. x

    litres are removed and replaced with water, and this is done three times. If in the end there are 512 litres of water in the vessel, find x.
    A 220 Correct Answer Incorrect Answer
    B 320 Correct Answer Incorrect Answer
    C 260 Correct Answer Incorrect Answer
    D 390 Correct Answer Incorrect Answer

    Solution

    ATQ, 1000 ├Ч (1 тАУ x/1000)┬│ = 1000 тАУ 512 1000 ├Ч ((1000 тАУ x)/1000)┬│ = 488 ((1000 тАУ x)/1000)┬│ = 488/1000 ((1000 тАУ x)/1000)┬│ = 61/125 ((1000 тАУ x)/1000)┬│ = (17/25)┬│ (1000 тАУ x) = 17/25 ├Ч 1000 1000 тАУ x = 680 x = 320

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